A5031888671- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Polar Research and Ecology
- Climate change and permafrost
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Geological Formations and Processes Exploration
- Paleontology and Stratigraphy of Fossils
- Microbial Community Ecology and Physiology
- Winter Sports Injuries and Performance
- Ancient and Medieval Archaeology Studies
- Methane Hydrates and Related Phenomena
- Historical and Archaeological Studies
- Diatoms and Algae Research
- Geological and Geochemical Analysis
- Landslides and related hazards
- Marine and environmental studies
- Geological Studies and Exploration
- Aeolian processes and effects
- Indigenous Studies and Ecology
- Botany and Plant Ecology Studies
- Arctic and Antarctic ice dynamics
- Image Processing and 3D Reconstruction
- Marine animal studies overview
- Geochemistry and Geologic Mapping
Masaryk University
2016-2025
Czech Geological Survey
2014-2024
Charles University
2021
University of South Bohemia in České Budějovice
2013
Abstract This study of landscape evolution presents both new modern and palaeo process-landform data, analyses the behaviour Antarctic Peninsula Ice Sheet through Last Glacial Maximum (LGM), Holocene to present day. Six sediment-landform assemblages are described interpreted for Ulu Peninsula, James Ross Island, NE Peninsula: (1) Glacier Snow Assemblage; (2) Glacigenic Assemblage, which relates LGM sediments comprises erratic-poor erratic-rich drift, deposited by cold-based wet-based ice...
Rapid warming of the Antarctic Peninsula is producing accelerated glacier mass loss and can be expected to have significant impacts on meltwater runoff regimes proglacial fluvial activity. This study presents analysis hydrology suspended sediment dynamics two streams James Ross Island, Peninsula. Mean water discharge during 8 January 2015 18 February reached 0.19 m3 s−1 0.06 for Bohemian Stream Algal Stream, respectively, equivalent specific 76 60 mm month−1. The daily regime strongly...
Abstract This study describes the origin, bedrock geology, geomorphology, hydrological stability and physical chemical characteristics of a representative set 29 lakes in ice-free parts Ulu Peninsula, James Ross Island, located close to northern tip Antarctic Peninsula. Based on these features, six different types were defined: stable shallow higher-altitude levelled surfaces, coastal lakes, old moraines, small unstable young deep cirque kettle lakes. We observed significant relationship...
Abstract The Northern Prince Gustav Ice Stream located in Channel, drained the northeastern portion of Antarctic Peninsula Sheet during last glacial maximum. Here we present a chronology its retreat based on situ produced cosmogenic 10 Be from erratic boulders at Cape Lachman, northern James Ross Island. Schmidt hammer testing was adopted to assess weathering state order better interpret excess cumulative periods pre-exposure or earlier release glacier. weighted mean exposure age five data...
Monitoring of active layer thawing depth and thickness (ALT), using mechanical pronging continuous temperature data logging, has been undertaken under the Circumpolar Active Layer – South (CALM-S) program at a range sites across Antarctica. The objective this study was to summarize key from in different Antarctic regions 2006 2015 review state Antarctica effectiveness CALM-S program. 16 involving 8 another boreholes have used study. Probing for thaw depth, while giving information on local...
Abstract This study calculates area, volume and elevation changes of two glaciers on James Ross Island, Antarctica, during the period 1979-2006. Davies Dome is a small ice cap. Whisky Glacier valley glacier. Ground-penetrating radar surveys indicate thickness, which was used for calculations bed topography both glaciers. Maximum measured thicknesses are 83 ± 2 157 m, respectively. Between 1979 2006, area cap decreased from 6.23 0.05 km to 4.94 0.01 (-20.7%), while glacier reduced 2.69 0.02...
Abstract Virtually no information is available on the response of land-terminating Antarctic Peninsula glaciers to climate change a centennial timescale. This paper analyses topography, geomorphology and sedimentology prominent moraines James Ross Island, Antarctica, determine geometric changes interpret glacier behaviour. The are very likely due late-Holocene phase advance featured (1) shearing thrusting within snout, (2) deformation basal sediment, (3) more supraglacial debris than at...
Abstract The termini of Icelandic glaciers are highly dynamic environments. Pronounced changes in frontal ablation recent years have consequently changed ice dynamics. In this study, we reveal the inter‐seasonal dynamics Kvíárjökull zone and proglacial using ArcticDEM Sentinel‐2 images acquired between 2011 2021 intra‐seasonal with repeated UAV surveys during summer 2021. Average glacier surface velocity ranged from 51 m year −1 2015 up to 199 2018, maxima within axial minima on edges....
Freshwater algae and cyanobacteria have been studied at the James Ross Island (Ant-arctica) since first Czech expedition to area in austral summer of 2004. Main emphasis, however, has devoted diatoms. Therefore, recent knowledge on biodiversity freshwater species green is fragmentary. The main aim presented study was contribute list from Island. To evaluate richness cyanobacteria, samples water/mats 6 different lakes, shallow ponds, seepages located northern deglaciated part were collected...
ABSTRACT Two small glaciers on James Ross Island, the north-eastern Antarctic Peninsula, experienced surface mass gain between 2009 and 2015 as revealed by field measurements. A positive cumulative balance of 0.57 ± 0.67 0.11 0.37 m w.e. was observed during 2009–2015 period Whisky Glacier Davies Dome, respectively. The results indicate a change from loss that prevailed in region first decade 21st century to predominantly after 2009/10. spatial pattern annual mass-balance distribution implies...
We have studied laminated sediments from Lake Esmeralda, Vega Island, in order to reconstruct its history. describe both inorganic and organic components of the sediment using a combination following analytical methods: x-ray fluorescence (XRF), diffraction (XRD), magnetic susceptibility measurement, chemical analysis for determination cation exchange capacity, grain size determination, geochemical analyses (total carbon (TIC), total (TOC), sulphur (TS)), spectrophotometry, high-pressure...
Abstract High‐latitude dust (HLD) depositions on four glaciers of James Ross Island (the Ulu Peninsula) were analysed. The deposition rate the selected varies from 11.8 to 64.0 g m −2 , which is one order magnitude higher compared in Antarctica or elsewhere world. A strong negative relationship between sediment amount and altitude a sampling site was found. This most likely caused by availability aeolian material atmospheric boundary layer. General southerly south‐westerly wind directions...
This study presents a 1:25,000 geomorphological map of the northern sector Ulu Peninsula, James Ross Island, Antarctic Peninsula. The covers an area c. 250 km2, and documents landforms surficial sediments one largest ice-free areas in Antarctica, based on remote sensing field-based mapping. large-scale landscape features are determined by underlying Cretaceous sedimentary Neogene volcanic geology, which has been sculpted overlying ice masses during glacial periods. Paraglacial periglacial...